Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: probability (user goal)
rejecting: probability-0.2.5.1, probability-0.2.5, probability-0.2.4.1,
probability-0.2.4, probability-0.2.3.1 (constraint from user target requires
==0.2.3)
trying: probability-0.2.3
trying: base-4.9.0.0/installed-4.9... (dependency of probability-0.2.3)
next goal: transformers (dependency of probability-0.2.3)
rejecting: transformers-0.5.2.0/installed-0.5..., transformers-0.5.2.0,
transformers-0.5.1.0, transformers-0.5.0.1, transformers-0.5.0.0,
transformers-0.4.3.0, transformers-0.4.2.0, transformers-0.4.1.0,
transformers-0.3.0.0 (conflict: probability => transformers>=0.0.1 && <0.3)
rejecting: transformers-0.2.2.1 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base>=2 && <4.8 || >=1.0 && <2)
rejecting: transformers-0.2.1.0, transformers-0.2.0.0, transformers-0.1.4.0,
transformers-0.1.3.0, transformers-0.1.1.0, transformers-0.1.0.1 (conflict:
base==4.9.0.0/installed-4.9..., transformers => base>=2 && <4.3 || >=1.0 &&
<2)
rejecting: transformers-0.0.1.0 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base<4.3)
rejecting: transformers-0.0.0.0, transformers-0.5.0.2, transformers-0.4.0.0
(conflict: probability => transformers>=0.0.1 && <0.3)
rejecting: transformers-0.2.2.0 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base>=2 && <4.6 || >=1.0 && <2)
rejecting: transformers-0.1.0.0 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base<4.3)
Dependency tree exhaustively searched.